Core-shell TiO2-based photocatalysts with specific composition,morphology,and functionality have attracted considerable attention for their excellent degradation properties on organic pollutants via a photocatalytic o...Core-shell TiO2-based photocatalysts with specific composition,morphology,and functionality have attracted considerable attention for their excellent degradation properties on organic pollutants via a photocatalytic oxidation process.Herein,a N-TiO2@NH2-MIL-88(Fe)core-shell structure was prepared by coating NH2-MIL-88(Fe)on nitrogen-doped TiO2(N-TiO2)nanoparticles.Introduction of heteroatom nitrogen to pure TiOz expands the spectra response range,leading to enhanced quantum efficiency of photocatalyst.Furthermore.loading NH2-MIL-88(Fe)or N-TiOz improved the adsorption ability of the nanocomposites due to the porous tunnels of NH2-MIL-88(Fe).The resulted core-shell N-TiO2@NH2-MIL-88(Fe)nanocomposites realized the transfer of photo excited electrons from N-TiOz to NH2-MIL-88(Fe)rapidly,partially reduced Fe to Fe^2+in NH^2+MIL-88(Fe),and further enhanced the Fenton effect on efficiently degrading methylene blue dye(MB)under visible light(>420 nm)with the assistance of H2O2.展开更多
基金Supported by the National Natural Science Foundation of China(Nos.52071027,51872025)the National Key Research anc Development Program of China(No.2016YFB0701100)+1 种基金National Key Research and Development H863 Program of China(No.18H86303ZT0032702)the Fundamental Research Funds for the Central Universities of China(Nos.FRF-GF-20-03A FRF-GF-19-006B)。
文摘Core-shell TiO2-based photocatalysts with specific composition,morphology,and functionality have attracted considerable attention for their excellent degradation properties on organic pollutants via a photocatalytic oxidation process.Herein,a N-TiO2@NH2-MIL-88(Fe)core-shell structure was prepared by coating NH2-MIL-88(Fe)on nitrogen-doped TiO2(N-TiO2)nanoparticles.Introduction of heteroatom nitrogen to pure TiOz expands the spectra response range,leading to enhanced quantum efficiency of photocatalyst.Furthermore.loading NH2-MIL-88(Fe)or N-TiOz improved the adsorption ability of the nanocomposites due to the porous tunnels of NH2-MIL-88(Fe).The resulted core-shell N-TiO2@NH2-MIL-88(Fe)nanocomposites realized the transfer of photo excited electrons from N-TiOz to NH2-MIL-88(Fe)rapidly,partially reduced Fe to Fe^2+in NH^2+MIL-88(Fe),and further enhanced the Fenton effect on efficiently degrading methylene blue dye(MB)under visible light(>420 nm)with the assistance of H2O2.
